Trying to figure out a party w/ NPCs I've hardly used before:
 

Help me complete a balanced party here:

So far, I've got:

Viconia
Haer'Dalis
Cernd

In my "standard setup" that works for my style of play, I'd like to have 1 primary spellchucker, and 2 more tanks. I also need somebody to handle locks and traps. Another requirement is that I'd really like to romance Viccy (I've started that once, but never completed it), and I need the party to stay together (without mods), so inparty killing is OUT.

I figure Imoen fits in pretty well for the main mage and traps/locks person, which leaves me needing 2 tanks.

I could use any of the following to fit that role:

Minsc
Korgan
Valygar
Mazzy (unconventional, but she works well in the role!)
Protagonist

I've never played a Wizard Slayer before, nor a Beastmaster. But I think a WS makes a better tank. I'm not dead-set on this though (as I love Berserkers). It's been a long time since I tried a single-classed Kensai too. Another interesting option is to try a Monk out.

Any and all suggestions here are welcome.
TIA

Re: Trying to figure out a party w/ NPCs I've hardly used before:
 

But remember Imoen is missing for most of the game, so I am not sure she is the best choice. I would recomend Jan or Yoshimo for a lock picker. As to a mage, Edwin is great, though he does like to argue with your other party members, especially as the party's reputation grows. There is also Aerie, who as a cleric/mage comes in handy.

As to tanks, I think Minsc rocks with great strength.